CN219416031U

CN219416031U - Measuring tool for rapidly measuring small diameter of deep and long internal threaded hole

Info

Publication number: CN219416031U
Application number: CN202320084556.8U
Authority: CN
Inventors: 李文奇; 陈洋; 徐海霞; 李传钊
Original assignee: Beijing Singukeller Automotive Cold Forming Parts Inc
Current assignee: Beijing Singukeller Automotive Cold Forming Parts Inc
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2023-07-25
Anticipated expiration: 2033-01-29

Abstract

The application discloses a measuring tool for rapidly measuring the minor diameter of a deep and long internal thread hole, which solves the problems that the conventional measuring tool is difficult to operate and the measuring precision is poor in the minor diameter size of the internal thread hole of an automobile special-shaped part in the prior art. The application comprises the following steps: the device comprises a digital display type inside micrometer and a supporting sleeve, wherein a measuring rod is arranged at one end of the digital display type inside micrometer, the measuring rod is a lengthened measuring rod and is used for measuring the minor diameter of an internal threaded hole of a measured part; the outer diameter of the measuring rod is precisely matched with the inner diameter of the supporting sleeve, so that the measuring rod slides in the supporting sleeve; the outer diameter of the supporting sleeve is matched and sleeved with the orifice of the measured part, so that the supporting sleeve can be smoothly placed into the inner hole of the measured part; the measuring tool can rapidly and accurately measure the small diameter size of the special-shaped part internal threaded hole, has small operation difficulty and high measurement accuracy, reduces the labor intensity of operators, improves the working efficiency, reduces the influence of human factors on measurement, and greatly improves the reliability.

Description

Measuring tool for rapidly measuring small diameter of deep and long internal threaded hole

Technical Field

The application relates to the technical field of special inspection tools, in particular to a measuring tool for rapidly measuring the minor diameter of a deep and long internal threaded hole.

Background

The field of automobile part production is used for conveniently and rapidly measuring and checking a special-shaped part with a relatively complex shape in a large batch, the part is provided with a relatively long inner hole, the special-shaped part is formed by tapping after drilling, and a customer has strict requirements on the small-diameter dimensional tolerance of the inner threaded hole of the finished product of the part and needs to be measured accurately. The part is used for a steering assembly of a certain vehicle type, and the part is precisely assembled with other parts through the internal threaded hole, so that assembly failure or function damage can be caused if the part is out of tolerance. The product is produced in a cold heading mode, the production efficiency is high, the number of planned production is large each year, about 3 ten thousand products are produced in each batch, and customers require products to be subjected to small diameter of internal hole threads in a certain proportion, so that qualification is ensured.

The small diameter size of the internal thread hole of the complex special-shaped part can not be measured by a traditional measuring tool, for example, although the measurement can be performed in the following way, different defects exist:

1. if a caliper is used, the length of the measuring cutting edge part of the caliper is limited, the width of the cutting edge is larger than the diameter of the threaded hole, and the measuring cannot be carried out deep into the inner hole; 2. if a three-coordinate measuring machine is used, an operator cannot accurately contact the spherical probe of the three-coordinate measuring machine with the tooth crest part of the inner hole by vision because a thread groove exists on the inner surface of the threaded hole, so that the spherical probe cannot accurately measure the numerical value of the small diameter; 3. if the optical method is adopted for measurement, the hole is a blind hole, light cannot be transmitted and imaged, the hole is deeper, and the method of reflecting light cannot be adopted for measurement; 4. if a common three-point contact type inside micrometer is adopted, the reachable depth of the measuring head is insufficient, and the micrometer is grasped manually, so that the measurement deviation of deflection, shaking and eccentricity on the measurement result cannot be ensured. In summary, it is difficult to measure the minor diameter of the internally threaded hole using a conventional measurement method, the operation difficulty is large, and the measurement accuracy is poor.

Disclosure of Invention

Therefore, the application provides a measuring tool for rapidly measuring the minor diameter of the deep and long inner hole thread, so as to solve the problems of the prior art that the operation difficulty is high and the measurement accuracy is poor when a conventional measuring tool is adopted for the minor diameter size of the inner hole of the special-shaped part of the automobile.

In order to achieve the above object, the present application provides the following technical solutions: a step of

A gauge for rapidly measuring a minor diameter of a deep and long internally threaded hole, comprising: the device comprises a digital display type inside micrometer, a measuring rod and a supporting sleeve, wherein the measuring rod is arranged at one end of the digital display type inside micrometer and is used for measuring the minor diameter of an internal threaded hole of a measured part;

the outer diameter of the measuring rod is matched and sleeved with the inner diameter of the supporting sleeve, so that the measuring rod slides in the supporting sleeve; the outer diameter of the supporting sleeve is matched and sleeved with the orifice of the measured part.

Optionally, the supporting sleeve is of an annular structure and comprises a main body positioned at the lower part and a retainer ring positioned at the upper part, wherein the retainer ring is positioned at the upper end of the part to be tested, and the main body is positioned in the part to be tested;

the inner wall of main part with the outer wall adaptation of measuring stick cup joints, the external diameter of main part with the drill way adaptation cup joints.

Optionally, the outer diameter of the retainer ring is the same as the outer diameter of the upper part of the measured part.

Optionally, the end of measuring stick is equipped with three measurement contact, and three measurement contact evenly sets up along the outside of measuring stick.

Optionally, the digital display type inside micrometer comprises a display unit and a handle, wherein the display unit and the handle are arranged at one end of the handle far away from the measuring rod.

Optionally, the length of the measuring rod is 50-100mm.

Compared with the prior art, the application has the following beneficial effects:

the application provides a measuring tool for rapidly measuring minor diameters of deep and long internal threaded holes, which comprises: the device comprises a digital display type inside micrometer and a supporting sleeve, wherein a measuring rod is arranged at one end of the digital display type inside micrometer, the measuring rod is a lengthened measuring rod and is used for measuring the minor diameter of an internal threaded hole of a measured part; the outer diameter of the measuring rod is precisely matched with the inner diameter of the supporting sleeve, so that the measuring rod slides in the supporting sleeve; the outer diameter of the supporting sleeve is matched and sleeved with the orifice of the measured part, so that the supporting sleeve can be smoothly placed into the inner hole of the measured part; the application of the measuring tool can rapidly and accurately measure the required numerical value (the small diameter size of the internal threaded hole of the special-shaped part), the operation difficulty is small, and the measuring precision is high; compared with the traditional measurement mode, the method greatly simplifies the measurement work, releases the measurement personnel from complex operation, reduces the labor intensity of the operation personnel and improves the working efficiency; the measuring tool is adopted for measurement operation, so that the influence of human factors on measurement can be greatly reduced, the reliability is greatly improved, the measurement result is highly reliable, and the probability of measurement errors is as low as negligible; and the measuring rod is lengthened so as to measure the small diameter size of the inner threaded hole of the automobile special-shaped part with a deeper length.

Drawings

For a more visual illustration of the prior art and the present application, several exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

FIG. 1 is a front view provided by one embodiment of the present application;

FIG. 2 is a side view provided by one embodiment of the present application;

FIG. 3 is a top view provided by one embodiment of the present application;

FIG. 4 is a cross-sectional view of the device shown in FIG. 1;

fig. 5 is a partial schematic view of the portion a in fig. 4.

Reference numerals illustrate:

1. digital display type inside micrometer; 101. a display unit; 2. a measuring rod; 201. measuring contacts; 3. a support sleeve; 301. a main body; 302. a retainer ring; 4. a part to be measured; 41. an inner bore; 411. an internal threaded hole; 412. an orifice.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

The measuring tool for rapidly measuring the minor diameters of the deep and long internal threaded holes can be applied to the field of automobile zero-production, and can be used for conveniently and rapidly measuring and checking special-shaped parts with complicated shapes in batches.

Referring to fig. 4, the special-shaped part has a relatively deep internal threaded hole 411, the internal threaded hole 411 is M8, the depth is about 60mm, the small diameter dimension tolerance of the internal threaded hole 411 of the finished part is very strict for customers, accurate measurement is required, and the small diameter of the internal threaded hole 411 is required to meet the drawing tolerance within the effective thread depth range. This component is used in a steering assembly for a vehicle model and is precisely assembled with other components through the internally threaded hole 411, and if there is an overrun, the assembly will be disabled or the function will be impaired. The product is produced in a cold heading mode, the production efficiency is high, the number of planned production is large each year, about 3 ten thousand products are produced in each batch, and customers require products to be subjected to small diameter of internal hole threads in a certain proportion, so that qualification is ensured. Because the detection quantity of the parts is large, and the measurement quality of the small diameter of the inner hole thread is strictly required, the operation difficulty of the conventional measuring tool is large, the measuring precision is poor, the deviation is large, and the measuring efficiency is low.

The measuring tool for rapidly measuring the minor diameters of the deep and long internal threaded holes can rapidly and accurately measure the minor diameters of the internal threaded holes 411 of the special-shaped parts, reduces labor intensity of personnel, and improves working efficiency and measuring accuracy. As shown in fig. 1 to 5, the present gauge includes: the digital display type inside micrometer comprises a digital display type inside micrometer 1, a measuring rod 2 and a supporting sleeve 3, wherein the measuring rod 2 is arranged at one end of the digital display type inside micrometer 1, and the measuring rod 2 is a lengthened measuring rod; the measuring rod 2 is used for measuring the minor diameter of an internal threaded hole 411 (deep in an inner hole) of the measured part 4;

the support sleeve 3 is of an annular structure and comprises a main body 301 positioned at the lower part and a retainer ring 302 positioned at the upper part, wherein the retainer ring 302 is positioned at the upper end of the part 4 to be tested, and the main body 301 is positioned in the part 4 to be tested;

the part 4 to be measured is provided with an inner hole 41 with an open upper end, the lower part of the inner hole 41 is the inner threaded hole 411, the outer diameter of the upper part of the inner hole 41 (namely, the position of the orifice 412) is matched with the outer diameter of the main body 301, and the length of the upper part of the inner hole 41 is matched with the length of the main body 301 (basically the same), so that the main body 301 can be just arranged at the position of the orifice 412 of the inner hole 41.

The outer diameter of the measuring rod 2 is matched and matched with the inner diameter of the supporting sleeve 3, and the measuring rod 2 slides in the supporting sleeve 3, but a large gap cannot be perceived; the outer diameter of the supporting sleeve 3 is matched and sleeved with the orifice 412 of the measured part 4, and the supporting sleeve 3 is well in clearance fit, so that the supporting sleeve 3 can be smoothly placed into the inner hole 41 of the measured part 4.

In this embodiment, the inner wall of the main body 301 is in fit and sleeved with the outer wall of the measuring rod 2, so that the measuring rod 2 slides in the supporting sleeve 3; the outer diameter of the body 301 is adapted to socket with the aperture 412.

Preferably, the outer diameter of the retainer ring 302 is the same as the outer diameter of the upper portion of the part 4 under test.

Preferably, the end of the measuring rod 2 is provided with three measuring contacts 201, the three measuring contacts 201 being arranged evenly along the outside of the measuring rod 2.

Preferably, the digital display type inside micrometer 1 comprises a display unit 101 and a handle, wherein the display unit 101 and the handle are arranged at one end of the inside micrometer far away from the measuring rod 2, and the display unit 101 is a display screen; the structure and principle of the digital display type inside micrometer 1 and the measuring rod 2 are similar to the traditional structure, and are not repeated here.

Preferably, the length of the measuring rod 2 is 50-100mm.

The support sleeve 3 in this embodiment may be manufactured from die steel and may be provided with a special heat treatment process to enhance structural stability so that dimensional and shape stability may be maintained during use.

When the embodiment is used, an operator firstly installs the supporting sleeve 3 on the measuring rod 2 (lengthened measuring rod) and performs test sliding to ensure that the gap between the supporting sleeve 3 and the measuring rod 2 is proper; then correctly installing the measuring rod 2 on the digital display type inside micrometer 1, and zeroing by using a standard ring; the handle of the digital display inside micrometer 1 is held tightly, so that three measuring contacts 201 at the tail end of the measuring rod 2 are in a contracted state, and the measuring rod 2 is extended into the position of the internal threaded hole 411 of the measured part 4; moving the support sleeve 3 to the position of the orifice 412 of the part 4 to be tested, so that the main body 301 of the support sleeve 3 is completely inserted into the inner hole 41 (namely, the position of the orifice 412); the handle of the digital display inside micrometer 1 is continuously loosened and tightened, the measuring position and angle are carefully adjusted, 2-3 circles of internal threads are kept in good contact with the measuring contact 201 of the measuring rod 2, so that the value of the minor diameter of the internal thread hole 411 is measured, an error result is eliminated, and correct data are recorded.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims

1. A gauge for rapidly measuring the minor diameter of a deep and long internally threaded hole, comprising: the device comprises a digital display type inside micrometer, a measuring rod and a supporting sleeve, wherein the measuring rod is arranged at one end of the digital display type inside micrometer and is used for measuring the minor diameter of an internal threaded hole of a measured part;

2. The measuring tool for rapidly measuring the minor diameter of the deep and long internally threaded hole according to claim 1, wherein the supporting sleeve is of an annular structure and comprises a main body positioned at the lower part and a retainer ring positioned at the upper part, the retainer ring is positioned at the upper end of the measured part, and the main body is positioned in the measured part;

3. The gauge for rapidly measuring the minor diameter of a deep and long internally threaded hole according to claim 2, wherein the outer diameter of the retainer ring is the same as the outer diameter of the upper part of the measured part.

4. The measuring tool for rapidly measuring the minor diameter of the deep and long internally threaded hole according to claim 1, wherein three measuring contacts are arranged at the tail end of the measuring rod and are uniformly arranged along the outer side of the measuring rod.

5. The gauge for rapidly measuring the minor diameter of a deep and long internally threaded hole according to claim 1, wherein the digital display type inside micrometer comprises a display unit and a handle, and the display unit and the handle are arranged at one end of the display unit far away from the measuring rod.

6. The gauge for rapidly measuring the minor diameter of a deep and long internally threaded hole according to claim 1, wherein the length of the measuring rod is 50-100mm.